Flag pin



FIG. 1 is a perspective view of a flag pin showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the Figures are included for the purpose of illustrating environment and form no part of the claimed design. 

CLAIM The ornamental design for a flag pin, as shown and described. 